py-cffi: Do not attempt to peek past pkg-config on Darwin/FreeBSD

devel/py-cffi/distinfo

@@ -1,7 +1,8 @@
-$NetBSD: distinfo,v 1.48 2023/10/04 21:51:44 adam Exp $
+$NetBSD: distinfo,v 1.49 2024/03/19 10:49:46 nia Exp $
 
 BLAKE2s (cffi-1.16.0.tar.gz) = 9573f137415a07450c7403bd50d5335cd101f538567b9ada700cc00ed88eeff6
 SHA512 (cffi-1.16.0.tar.gz) = fd2588115092202aa9289c9d4e0a0b3e264b5e9ec1dc192950f31aeb412fd9f9d4e5c96a3f9c6762987b58ccc1e229f2012ddda89211797104df672d8ed51152
 Size (cffi-1.16.0.tar.gz) = 512873 bytes
+SHA1 (patch-setup.py) = 5d31edc3a7787f04f4e4f18fc4deb25daf338401
 SHA1 (patch-testing_cffi0_test__verify.py) = 91e903aa6aa89f997aba1578cb9452e6ac160f50
 SHA1 (patch-testing_cffi1_test__verify1.py) = 72d564ff8422bc1c8ed8b7058fb95ca669b69529

devel/py-cffi/patches/patch-setup.py

@@ -0,0 +1,23 @@
+$NetBSD: patch-setup.py,v 1.1 2024/03/19 10:49:46 nia Exp $
+
+Nope, we want the one from pkgsrc. Honour pkg-config.
+
+Also, -iwithsysroot is not supported by all compilers.
+
+--- setup.py.orig	2024-03-19 10:46:00.000000000 +0000
++++ setup.py
+@@ -148,14 +148,6 @@ else:
+     ask_supports_thread()
+     ask_supports_sync_synchronize()
+ 
+-if 'darwin' in sys.platform:
+-    # priority is given to `pkg_config`, but always fall back on SDK's libffi.
+-    extra_compile_args += ['-iwithsysroot/usr/include/ffi']
+-
+-if 'freebsd' in sys.platform:
+-    include_dirs.append('/usr/local/include')
+-    library_dirs.append('/usr/local/lib')
+-
+ forced_extra_objs = os.environ.get('CFFI_FORCE_STATIC', [])
+ if forced_extra_objs:
+     forced_extra_objs = forced_extra_objs.split(';')